Android devices can only be used for debugging apps if your computer is "authorized" to develop on.
If Expo CLI is running, stop it with ctrl+c -- this will stop ADB.
- Disconnect your Android device from the computer.
- Revoke USB Debugging on the device:
- Open the
Settings
app on your device. - Navigate:
Developer Options
-> select Revoke USB debugging authorizations.
- Open the
- Reconnect the device:
- The device will prompt you to agree to connect the computer. You must confirm it.
- The computer is now authorized for debugging!
- Open
Genymotion
->Settings
->ADB
-> select Use custom Android SDK tools - Point it to your Android SDK directory.
By default, Android Studio installs the SDK tools in the following folders:
- Linux:
/home/your_username/Android/Sdk
- macOS:
/Users/your_username/Library/Android/sdk
- Windows:
%AppData%\Local\Android\Sdk
For more help with Genymotion, refer to their docs.